Spi Review Questions: Doppler Questions And Answers 100% Verified A+ Guaranteed

Which component of the Duplex ultrasound system processes the Doppler shift information to provide the Doppler waveform? A. quadrature phase detector and fast fourier transformer B. fast fourier transformer C. demodulator D. quadrature phase detector {Ans: B. fast fourier transform}Which of the following is inversely related to the Doppler shift? A. speed of the sound in tissue B. speed of the red blood cells C. cosine of the angle between the flow and the detector D. number of red blood cells {Ans: A. speed of sound in soft tissue}Which of the following is NOT true regarding pulsed wave Doppler? A. PW Doppler allows the technologist to select the depth at which they evaluate flow. B. PW Doppler transducers use a single element to send and receive the US waves. C. PW Doppler provides the most accurate display of a range of velocities in a blood vessel. D. PW Doppler is most useful in detecting stenosis greater than 85%. {Ans: D. PW Doppler is most useful in detecting stenosis freater than 85%}No flow is detected while performing a Color Doppler evaluation of a normal patent vein. What will improve the color display? A. increase the sample size B.